Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements (Details Textual)

v2.4.0.6
Fair Value Measurements (Details Textual) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2012
Level 1 [Member]
Dec. 31, 2011
Level 1 [Member]
Fair Value Measurements (Textual) [Abstract]      
Money market funds   $ 20,682 $ 52,383
Fair value assets transfers between levels amount $ 0